Uji Efektivitas Ekstrak Batang Brotowali (Tinospora crispa (L.) Miers.) pada Hama Padi Wereng Batang Coklat (Nilaparvata lugens Stal.) dalam Skala Rumah Kaca

Abstract

In Indonesia rice plant (Oryza sativa) is the main food commodity for Indonesian people. This is because every year the need for rice in Indonesia continues to increase along with the increasing population growth witch is very fast however, rice production often decreases due to the attack of rice pests namely brown bars planthopper (Nilaparvata lugens Stal.). The brown planthopper attacks rice plants during the vegetative period which results in direct or indirect damage. Most farmers still use chemical pesticides to control pests in rice plants, but now the use of chemical pesticides is being reduced and replaced with vegetable pesticides. Plants that can be used as botanical pesticides are brotowali (Tinospora crispa (L.) Miers.) which can be used on the stem. The aim of the study was to determine the effect of vegetable pesticides from brotowali stem extract and the best concentration on the death of brown planthopper. The experimental design in this study was a randomized block design of five treatments with a concentration of t0 : control/no treatment, t1 : 3.125% (3.125 ml brotowali stem extract + 96.875 ml distilled water), t2 : 6.25% (6.25 ml brotowali stem extract + 93.75 ml distilled water), t3 : 12.5% (12.5 ml brotowali stem extract + 87.5 ml distilled water), t4 : 25% (25 ml brotowali stem extract + 75 ml distilled water) and consisted of four groups in order to 20 experimental units. The results showed that the treatment had a very significant effect on the death of brown planthopper and the best concentration of brotowali stem extract was t4 : 25% wich was 82.50% effective for hilling brown planthopper. Keywords : food, rice, pesticides, concentration.